Molar Mass of Na2CO3·10H2O (Sodium Carbonate Decahydrate)

Molar Mass Calculator
Chemical formula Write symbols with a capital letter: CoCl2 is cobalt chloride, COCl2 is phosgene. A hydrate takes a dot: CuSO4·5H2O or CuSO4.5H2O

What is the molar mass of Na2CO3·10H2O?

Answer

M(Na2CO3·10H2O) =
286.138 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024).

10 H2O — water of crystallization, part of the molar mass: 10 × 18.015 = 180.150.

Na2CO3·10H2O = Na2CO3 + 10 H2O → Na 2, C 1, O 13, H 20

Contribution of each element
Element Atoms, n Atomic weight, A n × A, g/mol Mass fraction, w
Nasodium222.99045.980 w ≈ 16.07%
Ccarbon112.01112.011 w ≈ 4.20%
Ooxygen1315.999207.987 w ≈ 72.69%
Hhydrogen201.008020.1600 w ≈ 7.05%
Σ = 286.138 g/mol w = 100%

Each fraction is rounded on its own, so the printed ones add up to 100.01%; unrounded, they make exactly 100%.

Atomic weights: CIAAW, Abridged Standard Atomic Weights (2024)

Mass fractions of the elements

Na 16.07%H 7.05%C 4.20%

Related Calculations

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Recalculate with different values ↑

Molar masses of substances nearby

FormulaM, g/mol
P₄O₁₀ (phosphorus pentoxide)283.886
FeH₈N₂O₈S₂ (ferrous ammonium sulfate)284.04
C₁₈H₃₆O₂ (stearic acid)284.484
Na₂CO₃·10H₂O (sodium carbonate decahydrate)286.138
ZnSO₄·7H₂O (zinc sulfate heptahydrate)287.54
CaWO₄ (calcium tungstate)287.91
C₁₂H₂₅NaO₄S (sodium lauryl sulfate)288.38

FAQ

What is the molar mass of Na2CO3·10H2O?

M(Na₂CO₃·10H₂O) = 286.138 g/mol

Is the water counted in Na₂CO₃·10H₂O?

Yes: the water of crystallization is part of the formula and of the molar mass. 10 H₂O add 10 × 18.015 = 180.150 g/mol; M(Na₂CO₃·10H₂O) = 286.138 g/mol, while anhydrous M(Na₂CO₃) = 105.988 g/mol.

How many grams are in 2 moles of Na₂CO₃·10H₂O?

m = n × M = 2 mol × 286.138 g/mol = 572.276 g.

See Also